Attachment for insulators



Oct. 9, 1934. w. L. ST|NSON ATTACHMENT FOR INSULATORS Filed March 6, l93l Patented Oct. 9, 1934 ATTACHMENT FOR INSULATORS William L. Stinson, Huntington, W. Va., assignor to Jefiery Dewitt Insulator Company, Kenova, W. Va., a corporation of West Virginia Application March 6, 1931, Serial No. 520,741

3 Claims.

This invention is an attachment for suspension type insulators of the character commonly employed in connection with high tension electrical transmission.

5 One of the objects of the invention is to provide an insulator of general application, equipped with simple means for dead ending the distribution line for electric power service. The invention also has for its object to provide an attachment of the character mentioned, which will not interfere with the assembly of two or more insulator units in series.

The invention will be hereinafter fully set forth and particularly pointed out in the claims.

In the accompanying drawing:--

Figures 1 and 2 are side elevations viewed at right angles with respect to each other, and illustrating a dead ending attachment constructed in accordance with the invention.

Referring to the drawing, 10 designates a suspension type porcelain insulator, which is provided with the usual metal clevis or suspension fitting 11, having legs 12 (preferably two in number), which are anchored in the top of the insulator.

The dead ending attachment A comprises a base 15 provided with a flat body 16, having a transversely disposed central opening 17. The lower edge of said body is preferably curved on an are from the same center as the opening 1'7,

as illustrated at 18. Said body is also provided with an arcuate hole 19, which is preferably curved on a radius struck from the center of the opening 17 and said hole forms a continuation of a peripheral groove 20 formed in the curved edge 18. The body 16, contiguous to the hole 19 is suitably braced or strengthened, as shown. Said base 15 is provided with projecting anchor members 21 (two being shown) which are secured in complemental recesses in the bottom of the insulator, in any suitable or desired manner, and disposed at right angles to the legs of the clevis. The dead ended conductor is illustrated at 22, and the clamp therefor is shown at 23. It will be noted that the legs 12 and 21 extend well into the dielectric body of the insulator 10, so that the lower extremities of the legs 12 are well below the upper extremities of the legs 21, thereby placing the dielectric in shear.

In practice, the dead end of the line wire 22 is threaded through the opening 19, and brought around close to the main body of said wire, being secured thereto by the clamp 23, the said wire fitting smoothly in the groove 20.

The advantages of the invention will be readily understood by those skilled in the art to which it belongs. It will be particularly noted that a very simple and eflicient form of dead ending device is provided forming part of a standard type insulator. It will also be noted that if desired the attachment when not in use for dead ending purposes, may be used to connect two adjoining insulators of a string. With this in View, the body 16 is made fiat so that it may fit between the arms of a standard clevis 11, and be united thereto by the usual bolt passed through the opening 17. By constructing the parts with the ends of the legs in overlapping relation, as shown, the mechanical stresses are carried in shear and compression, rather than in tension, so that in case of a defective porcelain becoming cracked, the conductor will be sustained by the metal parts until the damaged unit may be replaced.

Having thus explained the nature of the invention and described an operative manner of constructing and using the same, although without attempting to set forth all of the forms in which it may be made, or all of the forms of its use, what is claimed is:--

1. A dead ending attachment for insulators comprising a base having anchor members projecting from one face thereof and an integral fiat body projecting from the other face thereof, said body having a transverse bolt receiving opening therethrough, so that the body may be pivotally connected with the clevis of an insulator unit, the exposed edge of said body being curved on an arc concentric with said opening and having a cable receiving groove therein, said body also having an arcuate opening therein contiguous to the base, said opening being on an arc concentric with said transverse opening and in alignment with the cable receiving groove.

2. A dead ending attachment for insulators comprising a flat base having means projecting from one face thereof constructed and arranged to engage an insulator, and an integral relatively thin flat body projected at approximately right angles from the middle portion of the other face of said base and having a free extremity, said body also having a transversely disposed bolt-receiving opening therein, so that the body may be connected with the clevis of another insulator, said body also having an arcuate cable-receiving opening therein contiguous to the base and extended from edge to edge thereof, said last mentioned opening being concentric with the axis of said bolt-receiving opening.

3. A dead ending attachment for insulators posed bolt-receiving opening and also having an arcuate cable-receiving opening therein contiguous to the base and extended from edge to edge thereof, said curved edge and said arcuate opening being concentric with the axis of said boltreoeiving opening.

. WILLIAM L. STINSON. 

